Pressor-operated percussive tool.



No. 861,646. PATENTED JULY 30, 1907'.

A. H. GIBSON.

PRESSOR OPERATED PERGUSSIVB TOOL.

APPLIUATION IILED FEB. 20, 1907.

' 3 SHEETS-SHEET 1.

qpilneooeb: 5916123160 0 ARTHUR H.'GIBSON, OF EASTON PENNSYLVANIA, ASSIGNOR-T-O INGERSOLL-RAND' COMPANY, NEW YORK N. Y., A CORPORATION OF NEW JERSEY PRESSOR-OPERATED PERCUSSIVE TOOL.

To all whom it may concern:

Be it known that I, ARTHUR H. GIBsON, a subject of the King of Great Britain, and a resident of Easton, in the county of Northampton and State of Pennsylvania, have invented a new and useful Improvement in Prcssor-Operated Percussive Tools, of which the following isa specification. a

My invention relates generally to percussive tools of that class in' which a pressor is utilized for operating the tool by reciprocating columns of air.

' The object of my invention is to provide means controlled by the operation of the pressor for raising the pressure of air on the side of the'systein which imparts the forward or striking movement to the tool, additional means being provided for feeding air'pressure to the other side of the system in the amount desired for obtaining the most satisfacto results in the operation of the tool.

A further object is to provide a pump driven by the pressor, arranged to deliver air under pressure to the side of the system which leads to the back of the tool and at a time when the pressor is moving outwardly to cause the air column to force the tool toward its work and an air pocket being also provided, the port of the pocket being located in the-pressor cylinder in position to be opened alternately to the opposite sides of the pressor piston, the air pressure being raised in the said pocket by'the early portion of the reciprocating movement of the piston and the air pressure being delivered during the latter portion of the said reciprocating movement; a greater amount of air pressure being delivered from the pocket to one side of the pressor piston than to the other owing to the raising of the pressure'on one side of the system by the air pump and owing to the location of the port of the air pocket in the pressor cylinder.

A practical embodiment of my invention is represented in the accompanying drawings, in which Figure 1 represents a track channeler in side elevation with my improvedpressor applied thereto, Fig. 2

isan end view of the same partially in section, 3 is a top plan view, Figs. 4 and 5 are detail sections show-- ing the manner of mounting the clutch operating levers, Fig. 6 is an enlarged detail section showing one of the clutches and its adjacent parts, Fig. 7 isa detail section taken in the plane of the line A of Fig. 2 looking in the direction of the arrow, and Fig. 8 is a detail section taken in the plane of the line B of Fig. 1 looking in the direction of the arrow.

, The truck which carries the parts is denoted by 1 and it is provided with two axles 2 and 3, each axle being provided with a pair of traction wheels 4. The truck is arranged to travel on a track 5 laid in position'tp bring the channeler into proper relation to its work. The

channeler cylinder is denoted by 6 and it is mounted Specification of Letters Patent. Application filed February 20, 1907. Serial No- 358,467.

Patented Jur 30, 1907.

on a shell 7 which is adjustable on a swinging back frame 8 hinged to the truck 1 as is usual.

The air pressor is mounted on the truck at a point midway its ends, which pressor is driven from an electric motor 9, also carried by the truck.

. The pressor cylinder is denoted by 10 and it is connected to the percussive tool cylinder 6 by two fleirible tubes 11 and 12 whereby the pressor may be caused to operate the channelor by reciprocating columns of air. The tube 11 leads from the outer side of the pressor cylinder 10 to the back of the tool cylinder 6 and the tube 12 leads from the inner side of the pressor cylinder 10 to the front of the said tool cylinder 6.

The crank shaft 13 of the pressor is-driven from the shaft 14 of the electric motor through gears 15, 16. The .electric motor is further used to reciprocate the truck by the following means:-The shaft 14 of the electric motor is provided with a pinion 17 which is arranged to drive two bevel gears 18,-19, in opposite directions, which bevel gears are loosely mounted on a horizontal drive shaft 20 having geared connections 2], 22, with the truck axles 2,3. The bevel gears 18, 19, form part of two friction clutches, the sliding members 23, 25, being keyed to rotate with the shaft 20 and arranged to be interlocked with the friction members 24, 26, of said gears. Each of these friction members is arranged as shown in Fig. 6, which illustrates the clut ch 25 in which the member 26 normally rotates with its gear 18 by being frictionallyclamped between a flange 18*, of

the gear 18 and a spring pressed ring 26* secured to the interior of a cylindrical casing. 26**. These two movable clutch members have operating levers 27 27* connected by a rod' 29 so that they are moved simultane-' ously. j I

When the lever 27 is in its intermediate position both of the clutches are disengaged and the truck will re-.

main at rest even thoughthe motor be running. When the lever 27 ismoved into positionto throw the clutch member 23 into engagement with its corresponding clutch member, the truck will be driven by the motor in one direction and when the lever 27 is thrown into position to bring the clutch member 25 into engagement with its corresponding clutch member, the clutch will be driven in the opposite direction.

A'pump for raising pressure in the system is connected to the pressor, the pump cylinder which uprises from the pressor cylinder 10 being denoted by 30.

The pressor piston is denoted by 31 and is ofthe trunk piston type. This pressor piston is provided with a forward extension 32 which is fitted to slide in the cylinder .30 and forms, together therewith, the pump. A pitman 33 connects the pressor piston 31 'With the crankshaft 13 of the pressor.

Inlet and discharge valves 34, 35, are located in the As thepump delivers all of its tem will be greater than that delivered to outer head 36 of the pump cylinder, which outer head also serves asavalve casing. A pipe 37 leads from the discharge valve of the pump to the side of the system which is used for imparting the striking stroke to the tool.

A compressed air pocket 38 has its port 39 opening into the'pressor, cylinder '10 at a point where the said port will be alternately opened. to the opposite sides of the pressor piston 31 during its reciprocating, movements. I

The parts are so arranged that the relation of the pressor and pump is such that as the pressor moves outwardly to move the column of air in the tube 11 in a direction to cause it to impart the striking blow to the tool, the pump will also deliver, its air" through the pipe 37 directly into the column thus'causing the air delivered by the pump to assist the striking column of airju'st as the blow is to be delivered. As the pressor piston reciprocates, the early part of its movement in both directions will compress the air inthe pocket 38 and during the latter part of the movement the port 39 will be opened to permit the escape of pocket to the other side of the pressor piston.

' It is to be understood that the port 39 of the pocket 38 maybe located atsuch a point intermediate the ends of the pressor cylinder 10 as to produce the best result in the transfer of air from one side to the other of the'system during the operation of the pressor. air to one side of the system it will be seen that the amount of air delivered to and from the air pocket to the other side of the systhe side of the system to which the pump delivers.

While I have shown my invention applied to an electro-pneumatic track channeler, it is to be understood that I do not-limit myself to such use as it may be applied to percussive tools of various kinds.

Whati claim is:- i v 1. A percussive tool a pressor arranged to operate the tool by reciprocating columns of air, an air pump and a passage leading therefrom for delivering its air directly to the side of the system which imparts the striking blow to the tool.

2. A-percussive tool, a pressor arranged to operate the tool by reciprocating columns of air, an air pump and a passage leading therefrom for delivering its air directly to the side of the system which imparts the striking. blow to the tool at the time that the pressor is moving the colnmn of air in the directlon to causetheforwartl movement of the tool.

3. A percussive tool,- a pressor arranged to operate the tool by reciprocating columns of air, an air pump driven by the pressor and a passage leading from the pump for delivering its air directly to the side of the system which imparts the strlking blow to the tool.

the air from the 4. A percussive'tool, a pressor arranged to operate the tool by reciprocating columns of air, an air pump driven by the pressor and a passage leading from the pump for delivering its air directly to the side of the system which imparts the striking blow to the tool at the time that the I pressor is moving the column of air.in the direction to cause the forward movement of the tool.

'5. A percussivetool, a pressor for reciprocating the tool by reciprocating columns of air, an air pump, a passage leading therefrom for delivering its air directly to one side of the system and a pocket connected to the pressor for feeding air under-pressure alternately to both sides of the system. I

G. A percussive tool, a pressor arranged to operate the tool by reciprocating columns of air, an air pump, a pas sage leading therefrom for delivering its air dircctl to the side of the system which imparts the striking blow to the tool and a pocket connected to the pressor for feeding air under pressure alternatelyto both sides of the system.

7 A tool cylinder, its piston, a pressor cylinder, its piston, air tubes connecting the ends of the two cylinders, a pump and a passage leading therefrom for delivering its air directly to the side of the system which imparts the striking blow to the tool. r

8. A tool cylinder, its piston, a pressor cylinder, its piston, air tubes connecting the front and back ends of the tool cylinder with the inner and outer ends, respectively, a pump and a passage leading therefrom air directly into the side of the system which. connects the back of the tool cylinder with the outer end of the pressor cylinder.

9: A tool cylinder, its piston, a pressor cylinder, its piston, air tubes connecting the ends of the two'cylinders, a pump, a passage leading therefrom for delivering its air directly to the side of the system which imparts the strik' ing blow to the tool and a pocketconnecte'd to the pressor cylinder for feeding air under pressure alternately toboth sides of the system. v

10. A tool cylinder, its piston, a pressor cylinder, its piston, air tubes connecting the front and backends of the tool cylinder withthe inner and outer ends, respectively, of the pressor cylinder, a pump, a passage leading therefrom for delivering its air directly into the side of the system which connects the back of the tool cylinder with the outer-end of the pressor cylinder and a pocket connected to the pressor cylinder for feeding air under pressure alternately to both sides of the system.

1 1. A pressor cylinder, air.tubes leading therefrom, a pressor piston, a pump, its inlet and'discharge valves and .a passage leading from the discharge valve of the pump to the outer end of the pressor cylinder.

12. A pressor cylinder,,air tubes pressor piston, a pump, its pipe leading from the discharge valve of the pump to the outer end of the'cylinder and a pocket connected to the pressor cylinder having its port arranged to be opened alternately to the opposite sides of the pressor piston.

In testimony, that I claim the foregoing as my invention, I have signed my name in presence of two witnesses, this sixteenth day of February 1907.

ARTHUR Ii. GIBSON.

Witnesses:

C. S. SUNDGREN, HENRY THIEME.

for delivering its leading therefrom, a I inlet' and discharge valves, a 

